mbyte2 replied to wen1's topic in Installation Guidesdamn. But, by the looks of it, it is GPU related. Have you tried rebuilding the kext cache and then rebooting? That is, after changing your dock's position.
mbyte2 replied to wen1's topic in Installation Guides@Cisar, try placing your dock to the left or the right of the screen, since I did that in my XPS (Lion 10.7.4) the artifacts stopped occurring. I think this solved the problem because of the reflections used in the dock when it is on the bottom of the screen (default position).